/**
 *  Copyright (c) 1997-2013, www.tinygroup.org (luo_guo@icloud.com).
 *
 *  Licensed under the GPL, Version 3.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *       http://www.gnu.org/licenses/gpl.html
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.tinygroup.order.order;

/**
 * 描述对象顺序的类
 * 
 * @author renhui
 * 
 */
public abstract class FeatureOrder {
	private String feature;

	public FeatureOrder(String feature) {
		this.feature = trimToNull(feature);
	}

	public String getFeature() {
		return feature;
	}

	public static String trimToNull(String str) {
		if (str == null) {
			return null;
		}

		String result = str.trim();

		if (result == null || result.length() == 0) {
			return null;
		}

		return result;
	}

}
